|Chip Amps Amplifiers based on integrated circuits|
Please consider donating to help us continue to serve you.
Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
||Thread Tools||Search this Thread|
|9th July 2003, 04:34 PM||#1|
Join Date: Mar 2003
Location: Lisbon, Portugal
PSU made with power op-amp and small trafo
Guys, I've been thinking...
Correct me if I'm wrong (I love to say this ) on my thoughts.
What I have in mind is from a small and cheap transformer (say, 2x24v/1A) make a good PSU for a GC.
The transformer would at the same time supply the power op-amp and the non-iniverting input.
That is, V+ connected to +IN on one power op-amp.
The other one would have the V- connected to +IN.
On the output of one op-amp you would have + voltage, and on the other one you would have the negative.
The voltage would be the same, because an op-amp won't swing more voltage than it has on the PSU supplying it, no matter what gain you configure it.
I was thinking in OPA541, for instance.
It's unity-gain stable.
My doubt, and the question here, is if I would have more current on the output than the current the transformer has (1A).
Wouldn't it be nice to have a 10A PSU (with OPA541) with a 1A transformer?
Am I dreaming?
|9th July 2003, 04:38 PM||#2|
Join Date: Dec 2001
Location: Pittsburgh, PA, USA
You are essentially using the opamp as a regulator.
|Thread Tools||Search this Thread|
|Thread||Thread Starter||Forum||Replies||Last Post|
|ARC SP6 (B) power-trafo (trade?)||Cobra2||Swap Meet||3||23rd March 2011 10:13 PM|
|Power trafo...||flyinglemur||Tubes / Valves||4||25th October 2007 08:52 AM|
|Power supply options.. bigger trafo with less caps or medium trafo with heavy caps?||rhythmdiy||Chip Amps||9||23rd October 2007 01:30 AM|
|18V or 36VCT Small Trafo wanted||Zero Cool||Swap Meet||3||7th April 2005 11:48 PM|
|Help!! Ive made it too small!!||johndory||Multi-Way||13||14th September 2004 11:36 AM|
|New To Site?||Need Help?|